According to Movses Khorenatsi, when Mesrop Mashtots died in 440, three options were discussed for his burial place: his native Taron; Goghtn, where he had begun his missionary work; and next to the graves of other saints in Vagharshapat, Armenia's capital and seat of the Catholicos. His body was eventually taken by Hmayeak Mamikonian, a military commander and the brother of Vardan Mamikonian, and Vahan Amatuni, Armenia's Persian-appointed hazarapet, to Oshakan, the latter's native village. This is attested by both Koriun, Mashtots' biographer, and Ghazar Parpetsi. According to Koriun, Vahan Amatuni built an "altar" on Mashtots' grave three years later, in 443. Hrachia Acharian interpreted it literally; he believed Amatuni simply added an altar in a pre-existing chapel. The modern view is that Vahan Amatuni built a temple, i.e. a martyrium or a chapel on Mashtots' grave. According to Elizabeth Redgate it was an underground martyrium. Not much is known about the history of the site until the modern period. Acharian wrote that the earliest inscription on the walls of the church dates to 1286. It was left by :hy:Սահմադին|Sahmadin, a wealthy Armenian, who apparently renovated the church. However, the inscription is now considered lost. In the early 19th century, :hy:Հովհաննես Շահխաթունյանց|Hovhannes Shahkhatuniants recorded five inscriptions at the church, four of which were dated 1285–1295. The inscriptions are believed to have been lost during the reconstruction of the 1870s. The 17th century historian Arakel of Tabriz wrote that the roof of the "temple-mausoleum" had entirely collapsed and that only the main altar was still extant. Catholicos Pilippos completely renovated the church between 1639 and 1645, but it was heavily dilapidated by the 19th century. Catholicos Nerses Ashtaraketsi made a failed attempt to renovate it in 1850. Mikayel Nalbandian, a writer and activist, visited Oshakan during his only visit to Armenia in 1860 and lamented its condition in a poem.
Reconstruction
Catholicos :hy:Գևորգ Դ Կոստանդնուպոլսեցի |Gevorg IV began reconstruction efforts in 1868. He successfully raised funds to reconstruct the church. In 1872 he officially called upon the Armenian people to support the cause in a kondak. Reconstruction works began in the spring of 1873 and were completed in 1879. The church was built by Greek workmen from Alexandropol. The new church was consecrated on October 21, 1879. The new church is a vaulted basilica built in black tuff. It has three entrances on the north, south, and west and eleven windows, not including the smaller windows on bell-tower. It has a capacity of 800 people. Acharian described it as a "mid-sized building, much more beautiful than usual rural churches, but lesser than churches of large cities." The grave of Mashtots is located in a cell under the main altar. In 1884 a new marble :File:Դամբարան Մեսրոպ Մաշտոցի, 2015.jpg|gravestone was erected on the grave of Mashtots, inside the church, through the funds of Archbishop Andreas, primate of the Artsakh Diocese. It was replaced with an Italian marble gravestone in 1962 that reads: Saint Mesrop Mashtots 361-440. A cylindrical bell-tower was added in 1884 on the eastern side of the church, crowned by a rotunda with eight columns. For its location on the eastern and cylindrical design, it is a rare example in Armenian architecture. In 1880 a memorial was erected on the grave of Vahan Amatuni just outside the church.
Later history
On October 13, 1912 Catholicos Gevorg V, other religious figures and common people traveled from Vagharshapat to Oshakan in a ceremonial procession as part of the celebrations of the 1,500 anniversary of the Armenian alphabet. The church underwent extensive renovation in the 1960s, during the reign of Catholicos Vazgen I, through the financial support of Hayk and Torgom Ghazarosian brothers of Milan, Italy, originally from Yerznka. A monument depicting the original 36 letters of the Armenian alphabet, as created by Mashtots, in the erkatagir style, was erected near the entrance to the grave of Mashtots. It was designed by Baghdasar Arzoumanian. The floor of the church was covered with basalt tiles. A wall with a length of was built around the church in tuff. A drinking fountain designed by Rafael Israelyan was erected at the church courtyard in 1964. The church was declared the seat of the Diocese of Aragatsotn in 1996. The prelacy building was unveiled in 1997. The surrounding area of the church was renovated in 2000 by Djivan Koboyan, an Armenian American philanthropist. In August 2012 archaeologist Frina Babayan uncovered remains of the 5th-century structure near the foundations of the bell tower.
Frescoes
The interior of the church was covered with frescoes by :hy:Հովհաննես Մինասյան|Hovhannes Minasian and :hy:Հենրիկ Մամյան|Henrik Mamian in 1961–64. They created the monumental fresco Glory to Armenian Letters and Literature, which depicts the invention of the Armenian alphabet. Major figures associated with Mashtots are included in it: Mashtots, Catholicos Sahak Partev, King Vramshapuh and prince Vahan Amatuni. Minasian also created the altarpiece, depicting the Virgin and Child, in 1966. The fresco was restored in 2019 restored through funding by Armenia's President Armen Sarkissian.
''Dpratun''
A school was established next to the church in 1913. It served as a public school during the Soviet period. The building was renovated in 1996-97 through the financial support of Djivan Koboyan, an Armenian American philanthropist, and was reopened on October 18, 1998. It serves as a dpratun, a scientific and educational center, dedicated to Mashtots and the Armenian alphabet.
